[Serusers] Performance tuning

Can anyone give me a realistic test case for measuring SER performance? I've been using sipsak to stress my SER server but am not able to interpret the result. Here are some sipsak were run: [siptest@sipuat siptest]$ sipsak -U -I -e 10000 -s sip:40@mysip.test -r 5060 -n 800 -z -vv [siptest@sipuat siptest]$ sipsak -U -I -e 50000 -s sip:30@mysip.test -r 5060 -n 2 -z -vv [siptest@sipuat siptest]$ sipsak -U -I -e 10000 -s sip:40@mysip.test -r 5060 -n 150 -z -vv [siptest@sipuat siptest]$ sipsak -U -I -e 10000 -s sip:40@mysip.test -r 5060 -n 50 -z -vv One of the result as follow: All usrloc tests completed successful. received last message 109125.023 ms after first request (test duration). biggest delay between request and response was 46082.422 ms 10 retransmission(s) received from server. 9 time(s) the timeout of 5000 ms exceeded and request was retransmitted. I guess a delay of 46s (46082.422ms) is definitely not acceptable. What should I set for -n to be comparable to real world traffic. And what kind of result should I expect. Side issue: During my stress test, I experience the same problem Andres reported last Nov. udp_rcv_loop:recvfrom:[11] Resource temporarily unavailable After I modify some kernel (Fedora Core 1, Linux 2.4.22) parameters, the problem seems to go away. Anyone happy to prove the case? # echo "8388608" > /proc/sys/net/core/rmem_max # echo "8388608" > /proc/sys/net/core/wmem_max # echo "8388608" > /proc/sys/net/core/rmem_default # echo "8388608" > /proc/sys/net/core/wmem_default Zeus ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error, you are prohibited from reading, copying, distributing and using the information. Please contact the sender immediately by return email and destroy the original message. ******************************************************************